A method and apparatus for ensuring QoS in a synchronous Ethernet bridge are disclosed, in which a classifier classifies an ingress packet according to a PHB mapped to a DSCP value of the packet and provides the classified packet to one of a predetermined synchronous packet queue and a predetermined asynchronous packet queue, a buffer queue with a plurality of queues mapped to priority levels buffers the classified packet, a marker marks the buffered packet as a synchronous packet or, if the buffered packet is an asynchronous packet, marks the packet in a predetermined format corresponding to a priority level of the packet, and a synchronous Ethernet scheduler schedules the marked packet.
Legal claims defining the scope of protection, as filed with the USPTO.
1. An apparatus for ensuring Quality of Service (QoS) in a Layer 2 (L2) network in which a synchronous Ethernet bridge interfaces with the (L2) network, said apparatus comprising: a classifier for classifying an ingress packet according to a Per-Hop Behavior (PHB) mapped to a Differentiated Service Code Point (DSCP) value of the packet and providing the classified packet to one of a predetermined synchronous packet queue and a predetermined asynchronous packet queue; a buffer queue with a plurality of queues mapped to priority levels, for buffering the classified packet; a marker for marking the buffered packet as a synchronous packet or, if the buffered packet is an asynchronous packet, marking the packet in a predetermined format corresponding to a priority level of the packet; and a synchronous Ethernet scheduler for scheduling the marked packet; wherein the marker marks the packet as a synchronous packet by converting an Ether Type (Etype) of a Media Access Control (MAC) header in the packet.
2. The apparatus of claim 1 , wherein the classifier classifies the packet as a synchronous packet, if the DSCP value indicates an Expedited Forwarding (EF) PHB.
3. The apparatus of claim 2 , wherein the classifier classifies the packet as a synchronous packet, if the DSCP value indicates a Class Selector (CS) PHB with high precedence.
4. An apparatus for ensuring Quality of Service (QoS) in a synchronous Ethernet bridge, comprising: a classifier for classifying an ingress packet according to a Per-Hop Behavior (PHB) manned to a Differentiated Service Code Point (DSCP) value of the packet and providing the classified packet to one of a predetermined synchronous packet queue and a predetermined asynchronous packet queue; a buffer queue with a plurality of queues mapped to priority levels, for buffering the classified packet; a marker for marking the buffered packet as a synchronous packet or, if the buffered packet is an asynchronous packet, marking the packet in a predetermined format corresponding to a priority level of the packet; and a synchronous Ethernet scheduler for scheduling the marked packet, wherein the marker marks the packet as a synchronous packet by converting an Ether Type (Etype) of a Media Access Control (MAC) header in the packet to 0x3305.
5. A method for ensuring Quality of Service (QoS) in a Layer 2 (L2) network in which a synchronous Ethernet bridge interfaces with the (L2) network, said method comprising machine executable code provided on a non-transitory computer readable medium causing a computer system to execute the steps of: classifying an ingress packet as one of a synchronous packet and an asynchronous packet according to a Per-Hop Behavior (PHB) mapped to a Differentiated Service Code Point (DSCP) value of the packet; buffering the packet in a predetermined highest-priority queue when said packet is determined is classified as a synchronous packet; marking the buffered packet as a synchronous packet; and scheduling the marked packet, wherein the buffered packet is marked as a synchronous packet by converting an Ether Type (Etype) of a Media Access Control (MAC) header in the packet.
6. The method of claim 5 , wherein the classification comprises the step of: classifying the packet as a synchronous packet, if the DSCP value indicates an Expedited Forwarding (EF) PHB.
7. The method of claim 6 , wherein the classification comprises the step of: classifying the packet as an asynchronous packet, if the DSCP value indicates one of an Assured Forwarding (AF) PHB and a best-effort PHB, and processing the asynchronous packet according to eight priority levels set as an Institute of Electrical and Electronics Engineers (IEEE) 802.1p/q Virtual Local Area Network (VLAN) tag.
8. The method of claim 5 , wherein the classification comprises classifying the packet as a synchronous packet, if the DSCP value indicates a Class Selector (CS) PHB with high precedence.
9. The method of claim 5 , wherein the marking comprises marking the packet as a synchronous packet by converting an Ether Type (Etype) of a Media Access Control (MAC) header in the packet to 0x3305.
10. A device for ensuring Quality of Service (QoS) in a Layer 2 (L2) network in which in a synchronous Ethernet bridge interfaces with the (L2) network, said device comprising: a processor in communication with a non-transitory memory, the processor executing code stored in said memory for classifying an ingress packet as one of a synchronous packet and an asynchronous packet according to a Per-Hop Behavior (PHB) mapped to a Differentiated Service Code Point (DSCP) value of the packet; buffering the packet in a predetermined highest-priority queue, with in said memory, when said packet is determined is classified as a synchronous packet; marking the buffered packet as a synchronous packet; and scheduling the marked packet, wherein the marker marks the packet as a synchronous packet by converting an Ether Type (Etype) of a Media Access Control (MAC) header in the packet.
11. The device of claim 10 , wherein the classification comprises the step of: classifying the packet as a synchronous packet, if the DSCP value indicates an Expedited Forwarding (EF) PHB.
12. The device of claim 11 , wherein the classification comprises the step of: classifying the packet as an asynchronous packet, if the DSCP value indicates one of an Assured Forwarding (AF) PHB and a best-effort PHB, and processing the asynchronous packet according to eight priority levels set as an IEEE) 802.1p/q Virtual Local Area Network (VLAN) tag.
13. The device of claim 10 , wherein the classification comprises classifying the packet as a synchronous packet, if the DSCP value indicates a Class Selector (CS) PHB with high precedence.
14. A device for ensuring Quality of Service (QoS) in a synchronous Ethernet bridge, comprising: a processor in communication with a non-transitory memory, the processor executing code stored in said memory for classifying an ingress packet as one of a synchronous packet and an asynchronous packet according to a Per-Hop Behavior (PHB) mapped to a Differentiated Service Code Point (DSCP) value of the packet; buffering the packet in a predetermined highest-priority queue, with in said memory, when said packet is determined is classified as a synchronous packet; marking the buffered packet as a synchronous packet; and scheduling the marked packet, wherein the marking comprises marking the packet as a synchronous packet by converting an Ether Type (Etype) of a Media Access Control (MAC) header in the packet to 0x3305.
Cooperative Patent Classification codes for this invention. Click any code to explore related patents in that topic.
August 9, 2007
May 11, 2010
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